Question

DELIMITER ;;
CREATE  PROCEDURE `CANCEL_ORDER`(IN order_id INT, IN buyer_user_id INT)
BEGIN
    SET autocommit=0;
    START TRANSACTION;
    SELECT customer_user_id INTO @userid FROM orders WHERE id=order_id;
    IF @userid=buyer_user_id THEN
        UPDATE orders SET status='failed',canceled_at=UNIX_TIMESTAMP(CURRENT_TIMESTAMP()) WHERE id=order_id;
        COMMIT;
    ELSE
        SIGNAL SQLSTATE '45000'
        SET MESSAGE_TEXT = 'Error: Customer ID in orders does not match with given buyer_user_id', MYSQL_ERRNO = 1003;
        ROLLBACK;
    END IF;
END;;
DELIMITER ;

第2行的错误1064（42000）：您的SQL语法出错; 检查与您的MySQL服务器版本对应的手册在'SET autocommit = 0附近使用正确的语法; 开始交易; 在第3行选择customer_user_id INTO'

嗨frds，如何纠正它

Answer 1

“DELIMITER ;;”无效

使用：DELIMITER New_delimiter Old_Delimiter_To_Finish_Line

两个分隔符必须是不同的

在程序的代码中使用旧分隔符，但用新代码完成; 恢复旧分隔符

DELIMITER $;
CREATE  PROCEDURE `CANCEL_ORDER`(IN order_id INT, IN buyer_user_id INT)
BEGIN
    SET autocommit=0;
    START TRANSACTION;
    SELECT customer_user_id INTO @userid FROM orders WHERE id=order_id;
    IF @userid=buyer_user_id THEN
        UPDATE orders SET status='failed',canceled_at=UNIX_TIMESTAMP(CURRENT_TIMESTAMP()) WHERE id=order_id;
        COMMIT;
    ELSE
        SIGNAL SQLSTATE '45000'
        SET MESSAGE_TEXT = 'Error: Customer ID in orders does not match with given buyer_user_id', MYSQL_ERRNO = 1003;
        ROLLBACK;
    END IF;
END;$
DELIMITER ; $

操作如下：tokenisateur将使用当前分隔符;提取第一个查询分隔符变为$ tokenisateur将使用当前分隔符$提取第二个查询并忽略旧分隔符;因此，不会分离存储过程的不同行。

然后，tokenisateur将使用Still active delimiter $分隔符提取第三个请求并成为; 这意味着要完成最后一个命令必须是一个;

其他事项：

START TRANSACTION;会自动更改autocommit
@userid是未定义
canceled_at = UNIX_TIMESTAMP (CURRENT_TIMESTAMP ())：如果该字段是TIMESTAMP，则完全没用。 TIMESTAMP字段会自动更新。

Answer 2

您可以使用以下方法：

DELIMITER $$

USE `test`$$

DROP PROCEDURE IF EXISTS `cancel_order`$$

CREATE DEFINER=`root`@`%` PROCEDURE `cancel_order`(IN order_id INT, IN buyer_user_id INT)
BEGIN
    DECLARE v_cancel BOOLEAN DEFAULT FALSE;
    SET autocommit=0;
    START TRANSACTION;
    SELECT TRUE INTO v_cancel FROM orders WHERE id=order_id AND customer_user_id=buyer_user_id;
    IF v_cancel THEN
    UPDATE orders SET STATUS='failed',canceled_at=NOW() WHERE id=order_id;
    COMMIT;
    ELSE
    SIGNAL SQLSTATE '45000'
    SET MESSAGE_TEXT = 'Error: Customer ID in orders does not match with given buyer_user_id', MYSQL_ERRNO = 1003;
    ROLLBACK;
    END IF;
END$$

DELIMITER ;

存储过程中的语法错误

2 个答案: